The safety of PVC composite stabilizers has received increasing attention.

       The safety of PVC composite stabilizers should be considered from three aspects. One is the safety of raw material processors, the other is the safety protection of users, and the third is the safety of wastes to the environment.

       The safety protection of the processor can be solved by measures such as liquefaction, paste formation and granulation of the stabilizer.

       For the user's safety protection, the stabilizer may be polymerized or a reactive stabilizer may be prepared to improve the resistance to the pumping, but in view of the fact that the stabilization is a molecular-level chemical reaction, the above method is not the most suitable method, and it is best. The method is still to use a high-safety stabilizer. When selecting a stabilizer, it is also necessary to consider the safety of the chemical generated by the reaction between the resin and the stabilizer or the stabilizer during the stabilization process.

       From the safety of various stabilizers, cadmium stabilizers will be discontinued in the near future. But one of the reasons for the slow process is that most cadmium-free stabilizers cost 10%-20% when used, and cadmium-free stabilizers cannot be used in a wide range of PVC blends. If the processing range is narrow, it is often necessary to use an auxiliary stabilizer to compensate for its performance defects. Now the performance of cadmium-free stabilizers has reached the performance of cadmium stabilizers. The rapid development of calcium-zinc stabilizers. They are sold in powders, pastes and liquids, as well as standard and non-toxic grades. Second-generation calcium-zinc stabilizers have replaced zinc-based tin and methyl tin in food and pharmaceutical packaging.

       Lead-based stabilizers have a small collection of extraction properties, so the safety during use is not a problem, but there are safety problems that endanger the environment. Due to the low cost and high efficiency of lead stabilizers, many companies use this. With the development of non-lead PVC composite stabilizers, lead salts are being replaced by non-toxic environmentally friendly stabilizers. Lead stabilizers are withdrawing from the market due to lead bans in many countries

       In short, the composite heat stabilizer is conducive to scale production and provides a new direction for the development of lead salt heat stabilizers. An important indicator of the composite lead salt stabilizer is the lead content. The lead content of the composite lead salt stabilizer currently produced is generally 20%-60%; the amount of the PVC plastic door and window profile is 3.5-6 parts.